Drag bucket and clevis therefor



Sept. 27, 19380 a. w. MORK DRAG BUCKET AND CLEVIS THEREFOR- Filed Jan. 8, 1957 I II INVENTOR.

ATTORNEYS.

on each sidefbehind the center 01 gravity, sup

My; invention movements in drag-buckets and clevisestherei'or. The conventional drag-bucket, known as a dragline'! excavatonis a boxlike ports the bucket. i A dragfch attachecl to drags the bucketthrough the thefront thereof. M

s o u fabov' itsoi t oi rpr'kine. thehoist chain} carries a. forwardlyprojecting sheave; A f

.commy, South ij l '1 Application ro m-ye,

for use on 'w'im' a showing part 1 my clevis, bucket.

I straddle the projecting part It hole I secured in place by a cotter-pin 22.

projects beyond the side-plate ll Milwaukee, Wis alsimr Milwaukee, i Delaware 1937, 8am No;

ence number is applied to similar members.

Fi ure 1 clevls. and bucket.

Figure 2 of my cle my bucket. I 7 I Figure 3 isa plan view of 1, taken along the line 01' the cooperating portion or my is a side elevation of a second form and of the cooperating portion or the device 01' Figure H of Figure 1, and of the bucket proper in section.

Figure 4 is a side elevation of a third form 0'! Referring now l4, and having a cylindrical vertical hole I! in a part i6 which projectsbeyond the side-plate, it. The clevls-plate I3 is preternsaslns the as ing two vertical holes I! in projections 20, which plate l3. v

Through vertical holes IS in the clevis, and ii in the clevis-plate, is

a 1 The device in Fl will appear from diflferencesj in the following deintegral) a clevis-plate l3,

preferably reinforced by ribs I4 and having a cylindrical vertical hole [5' in a. part l6 which The clevisplate I3' is'preferably bifurcated to straddle the side-plate I I the opening it, p Through vertical holes IS in the clevis, and 55 is a side elevation of one form of my and 01 the'cooperating portion of myinserted a, pin 2|,

sure 2 is similar except as.

ment with the drag chain,

different level 2 hole I! in the clevis-plate, is inserted a pin 2|, secured in place by a cotter-pin 22'.

The device inFigure 4 is similar to that in Figure 2 except as will a from differences in the following description. ii" is the side-plate of my bucket. Onto this is secured by bolts i!" (or by rivets, welding or other equivalent means; or the part might even be built integral) a clevisplate II" preferably reinforced by ribs ll", and having a cylindrical vertical hole ll in a part i6" which projects beyond the side-plate ii". Clevis-plate i3" is preferably bifurcated to straddle the side-plate H", as was shown in Figure 3.

i1" is a clevis, having a transverse opening I." for engaging the drag-chain (not shown); Open-. ing it" communicates clear through upwardly, thereby enabling this form of my clevis to be inserted through an unbroken link of my dragchain. Within this opening I." there is a protruding portion 23" for the purpose of confinin the chain to a definite part of the opening it".

One arm 24" of the clevis passes through vertical hole is" in the clevis-pla to serve as a pivot for theclevis therein. A ring 25" is placed over the two arms of the clevis, this ring being held in place by cotter-pins 22", and thus serves both to close the opening of my clevis and to restrain it from slipping out of my clevis-plate.

' It will be noted that, in all three embodiments of my invention, two levels of attachment of the drag chain are selectively attainable, by simply reversing the clevis. there is but one long strong place of swiveling attachment. Also that some part of the replaceable relatively inexpensive clevis always lies below the projecting portion it of the bucket, and thus protects it from ground-engaging wear.

Reverting now for a moment to Figure 3, I shall describe two important features of my clevis-plate II. This plate is split clear through to the hole l5, by the slot 26, and is provided with abutments 11, to bear against the edge of the side plates ii of the bucket. The slot 28 enables the clevis-plate to be sprung onto the side plates, a tight fit without m chining. The

H of

the shear due which always occursduring each Having now described and illustrated three forms of my invention, I wish it to be understood that my invention is not to be limited to the specific forms or arrangements of parts hereinbefore described, except insofar as such limitations are specified in the appended claims.

I claim:

1. Means for attaching drag bucket, comprising: a forwardly from the side of the bucket, and having a cylindrical substantially vertical hole, two fiat portions to straddle the side-plate of the bucket, a slot extending rearwardly from the hole whereby the two fiat portions are completely separated from each other throughout, and at least one projection extending inwardly from one of the fiat portions and bearing against the front edge of the side-plate; and a clevis assembly, having a cylindrical portion insertible in said hole for swiveling therein, means to secure this portion in place, a transverse hole for engageand means to positively confine the chain against vertical shifting while in this last-named hole; the last-named hole being so located in the assembly that a reversal of the assembly will move the hole to a materially with respe t to the bucket.

the drag chain to a clevis plate projecting veratingchain-link (not 2. Means for attachin a dra chain bucket. comprising: a ing from the side of the feet of which have provision attachment to the ing. and the U of which has a projection, in cooperation with the forward edge of the lug, for confinin a coopclaimed) to a position substantially nearer to one leg of the U than to the other; and means for swivelly attaching the clevis to the lug.

3. Meansforattachingadra chsintoadral bucket, comprising: a ing projecting forwardly from the side of the bucket; a U-shaped the feet of which have provision attachment to the ing, and a projection, in cooperation with the forward edge of the ing, for positively confining a cooperating chain-link (not claimed) to a position substantially nearer to one leg of the U than to the other; and means for swivelly attaching the clevis to the'lug; the clevis being further characterlsed by the fact that a portion of it will underlie the entire lug to take the groundengaging wear.

4'. A clevis, comprising: two legs, in feet having ali ned holes U-shaped portion, ating chain-link tion of sufilcient length as compared so that, in cooperation with the attaching portion of the bucket (not claimed), positively confine the cooperating chain-link to a position substantially nearer one leg than the other.

'5. A clevis, comprising: in 'feet having provision drag-bucket; a U-shaped portion, tion of a cooperating chain-link (not claimed); and a projection of sufhcient length as compare that, in cooperation with the the bucket (not claimed), it will serve to positively confine the cooperating chain-link to a position substantially leg than the other.

6. A clevis, comprising: two in feet having provision for drag-bucket; a U-shaped portion, for the reception of a cooperating chain-link (not claimed): sufficient length as compared with the legs so that, in cooperation with the attaching portion of the bucket (not claimed). it will serve to positively confine the cooperating chain-link to a position substantiallynearei' one leg than the other; the clevis being further characterized by the fact that a portion of it will underlie the attaching portion of the bucket to take the ground-engas s wear.-

'7. A clevis assembly, comprising: two legs, on of which is adapted-to be swivelly inserted ins hole on a dra -bucket (not claimed); a U in the other leg, for the reception of a cooperating chain-link (not claimed); a projection, in cooperation with the forward for positively confining this link substantially nearer the level of one end of the swiveling portion than of the other end; and means for simultaneously closing the openlni between the' two legs-and for retainin the swivel ing leg in place.

8. A clevis assembly,

toadrel forwardly comprising; two legs, on of which is adapted to be swivelly inserted t a hole on a drag-bucket (not claimed); a U i the other leg, for the reception of a oooperltin chain-link (not claimed); a projection, in c1:

proiect l thebueket;aU-shepedclevil.

itwillserveto f 2,1s1,oes 3 underlie the cooperating portion of the bucket to positively confine the chain against vertical shitttake the ground-engaging wear. ing while in this last-named hole; the last-named 10 9. A clevis plate for a drag-bucket, comprising: hole being so located in the assembly that a.

a projecting lug, containing'a substantially verreversal of the assembly will move the hole to a tical, hole; two flat portions to straddle the side materially different level with respect to the plate (not claimed) of the bucket, said flat porbucket.

tions being completely separated from each other 11. A clevis plate for-a drag-bucket, compris- 15 the hole by a slot; and at least one projection vertical hole; two flat portions to straddle the so as to bear against the front edge of the side portions being completely separated from each plate. other throughout so much of them as lies rear- 20 10. Means for attaching the drag chain to a wardly of the hole by a slot; and at least one drag-bucket, comprising: a clevis plate projecting projection extending inwardly from one of the forwardly from the side of the bucket, and having flat portions so as to bear against the front edge a cylindrical substantially vertical hole, two fiat of the side plate.

, portions to straddle the side-plate of the bucket, GEORGE W. MORK. 25

a slot extending rearwardly from the hole where- 

